The origin and development of the carrier frequency and achromatic concepts in holography

The concepts used in radar as applied to optical holography are discussed. Two aspects of the research are the introduction of the carrier frequency method into holography, and the ideas for achromatizing the process of holography, allowing holography to be carried out with radiation of greater band-width, with lesser coherence. The carrier frequency and the achromatic concepts as extended into optical holography are discussed. One aspect of the achromatic concept is the elimination of lateral chromatic dispersion in carrier frequency holography, permitting carrier frequency holography to be carried out with temporal coherence requirements no greater than for Gabor's in-line holography; and another is the elimination of longitudinal chromatic dispersion, which allows either in-line or carrier frequency holography to be carried out with spatially coherent white light.